Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B2610 00: Passenger Compartment Dimming 1 CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
LED Dimming Control | B2610 00 | 1 | 1 | -- |
1. Interior Backlighting Malfunction | ||||
Circuit/System Description
The body control module (BCM) supplies a voltage reference through the instrument panel (I/P) dimming voltage reference circuit to the interior lamp dimmer switch, which is part of the headlamp switch. When the dimmer switch is placed in a desired brightness position, reference voltage is applied through the dimmer switch rheostat and the I/P lamps dimmer switch signal circuit to the BCM. The BCM interprets this voltage signal, then applies a pulse width modulated (PWM) voltage through the LED dimming control circuit illuminating the components listed below:
| • | Radio |
| • | Inflatable Restraint I/P Module Disable Switch |
| • | Driver Information Center (DIC) Switch |
| • | Steering Wheel Control Switches |
Conditions for Running the DTC
| • | Ignition ON. |
| • | The headlamps or park lamps are ON. |
Conditions for Setting the DTC
The BCM detects a short to ground on the LED dimming control circuit.
Action Taken When the DTC Sets
The BCM does not attempt to illuminate the LED lamps.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred. |
Reference Information
Schematic Reference
Interior Lights Dimming Schematics
Connector End View Reference
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, cover the ambient light sensor, adjust the interior lamp dimming switch from dim to full bright. The LED lamps should dim and then become full bright.
Circuit/System Testing
- Ignition OFF, disconnect the harness connectors at all components fed by the BCM LED backlight lamp control circuit terminal 18 X3.
- Ignition ON, with a scan tool, clear the DTC.
- Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
- Reconnect each component one at a time and verify the DTC does not reset as current.
- If all circuits test normal, replace the BCM.
| ⇒ | If the DTC resets, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If the DTC resets as current, replace the component responsible for setting the DTC. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM or radio replacement, setup, and programming |
